Figure 3. Echo intensities of whole blood and thrombi as a function of the hematocrit.

The average echo intensity obtained from whole blood increased from 70.96 to 1401.52 when the hematocrit increased from 0% to 20%, and then decreased to 221 when the hematocrit increased to 50%. The intensity measured from thrombi also increased to a maximal value of 2546.15 at a hematocrit of 20% and decreased to 1931.93 when the hematocrit increased to 50%.